Gate-valve.



G. E. R. ROTHENBUGHER.

GATE VALVE.

APPLICATION FILED 53.19. 1909.

Patented sept.v.,28, 1909.

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G. E.' R. ROTHENBUCHER.

GATE VALVE.

APPLIOATION Hmm um. 19. 1909.

Patented Sept. 28, 1909. Mums-SHEET 2.

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GEORGE E. R. ROTHENBUCHER, OF ASTORIA, NEW YORK.

GATE-VALVE.

Specification of Letters Patent.

Patented Sept. 23, 1999.

To all whom 'it may concern:

Be it known that I, GEORGE E. R. ROTHEN- BCHER, a citizen of the UnitedStates, residing at Astoria, county of Queens, State of New York, haveinvented new and useful Improvements in Gate-Valves, of which thefollowing' is a specification.

This invention relates to a gate valve of novel construction, moreparticularly adapted to be used in conjunction with high pressure waterpipes, steam pipes etc.

The valve comprises essentially a sleeve adapted to be reciprocated atright angles to the liow of the liquid, and a pair of valve diskscarried by said sleeve and adapted to be moved in opposite directions,so as to either close or open the liquid inlet and liquid outlet of thevalve. Owing to the peculiar construction of the valve, wear of thevalve disks is reduced to a minimum, leakage is avoided, and breakage ofthe valve and pipes connected thereto is effectively prevented.

In the accompanying drawing: Figure 1 is a side view of my improved gatevalve; Fig. 2 a vertical section on line 2 2, Fig. 1; Fig. 3 a verticalsection on line 3 3, Fig. 2; Fig. 4 a side view of the sleeve; Fig. 5 aface view of one of the valve disks, and Fig. 6 a side view thereof.

The numeral 10 indicates a. valve housing provided with a pair of alinedlower openings 11 adapted for the passage of the liquid or other mediumunder pressure, the flow of which is to be controlled by the valve.IVithin housing 10 is centered a vertical spindle 12, having a lowerthreaded portion 13 that engages an internally threaded sleeve 14. Thelatter is provided at its lower end with a cone 15 adapted to be seatedupon a correspondingly recessed boss 16, formed at the base of housing10. To the top of the housing is secured, by screws 17, a cover 13having a tubular extension 19, the upper perforated section of whichconstitutes a bearing for spindle 12. Section 20 is recessed as at 21for the reception of the lower projection 22 formed on a disk 23 whichis secured to section 2O by screws 24. A collar 25, formed on spindle12, and engaging a corresponding socket of section 20, prevents an axialdisplacement of spindle 12 during its rotation. In order to prevent anescape of the liquid along spindle 12, a stuiling box 26 is provided. Tothe upper reduced end of spindle 12 is secured by nut 27 a first hand Awheel 23,'by means of which the spindle may be rotated.

Sleeve 14 is provided with a pair of trunnions 29, upon each of whichthere is rotatably mounted a conical toothed wheel 30, a disengagementof the wheel from the sleeve being prevented by a disk 31 secured totrunnion 29 by screws 32. Each toothed wheel 30 has an outwardlyprojecting annular flange or rim 33 provided with an internal thread 34.The latter is engaged by the corresponding outer thread of an annularflange 35 projecting inwardly from a valve disk 36. Bisk 36 is providedwith a pair of lateral projections or lugs 37 which are guided betweenparallel rails 33 of housing 10, to prevent rotation of disk 3G. Attheir outer sides, disks 36 are recessed for the reception of metallicpacking rings 39 adapted to contact with seats 40 encircling passages11, seats 40 being arranged parallel to one another. Itings 39 are madetapering at their inner sides to be engaged by similarly taperingclamping' plates 41 which serve to retain rings 39 within the recessesof disks 36, the clamping plates being secured to said disks by screws42. Toothed wheels 30 mesh into a common beveled gear wheel 43 having alower hub 44 which is stepped into a correspondingly recessed plate 45secured to sleeve 14 by screws 46. In this way wheel 43 may be freelyrotated with relation to sleeve 14, while a disengagement therefrom iseffectively prevented. From gear wheel 43, there extends upwardly anelongated toothed wheel 47 meshing into a pinion 43. The latter is faston a vertical spindle 49 which extends through cover 13. To prevent theescape of liquid, a stuffing box 50 is secured to cover 13. Spindle 49is journaled in a bearing 51 of tubular extension 19 and carries at itsupper end a relatively fixed pinion that engages a pinion 53 rotatableon spindle 12 and secured to the hub 54 of a second hand wheel 55.Spindle 12 is preferably stepped as at 56 to afford a seat for pinion53, and it is further provided with a circumferential groove 57. rlhelatter is engaged by a number of screws 53 tapped into hub 54 to preventan axial displacement of wheel on spindle 12.

It will be seen that a rotation imparted to hand wheel 55 will causeconical wheels 30 to be turned in opposite direct-ions, motion being'transmitted through spindle 12, pinions 53, 52, spindle 49, pinion 43,elongated toothed wheel L17 and beveled gear wheel This rotation ofwheel 30 will by threaded rims 33, 35 eli'ect either a spreading or acontracting of valve disks 36 according to the direction in which handwheel 55 is turned, any rotation of the disks being prevented by theengagement ot their projection 3T with rails 3S. ln this way packingrings 39 are either forced against seats 40, or they are withdrawntherefrom. A rotation ot hand wheel 28 will through threaded spindlesection 13 eli'ect a raising or lowering of sleeve 14 and consequentlyof valve disks 3G, according to the direction in which hand wheel 28 isturned. During an upward movei'nent, elongated toothed wheel 1T remainsin permanent engagement with pinion. 18, wheel 417 being accommodatedwithin tubular extension 19 ot' cover 1S.

1t it is desired to open the valve, hand wheel 55 is tirst so rotatedthat disks 3G are disengaged trom seats 110. Hand wheel 28 is thenturned in such a direction that sleeve 1-1 together with disks 36 israised, during which movement, extensions 37 of disks 36 ride alongrails 3S to prevent a rotation of said disks. In this way the liquidwill tlow unobstructed through the valve. It it is desired to close thevalve, hand Wheel 28 is lirst rot-ated to lower the gate until cone 15engages seat 1G, whereupon hand wheel 55 is turned to spread disks 36and torce them tightly against seats L10.

It will be seen that by my improved construction, a reliable and durablegate valve is provided. As disks 36 must first be slightly withdrawnfrom their seats before the gate can be raised, a gradual admission ofthe liquid or other medium to the valve is insured, so that any heavyshocks are avoided and breakage of the valve housing or of the pipesconnected thereto is effectively prevented. As the valve disks duringthe closure and opening of the valve move in a rectangular direction totheir seats, any sliding movement ot' the packing rings upon the seatsis avoided. A sliding movement ot' the packing rings is especiallyobjectionable, when liquids containing solid impurities are fed throughthe valve. lVhen these impurities are caught between valve and seatwhile closing the valve the packing rings are quickly worn out, whichwill soon result in .a leakage of the valve. lfiith my valve,

however, such impurities are pressed into the relatively soft metal ofthe packing ring, so that wear and leakage of the valve are ett'ectivelyprevented.

I claim:

1. A gate valve comprising a housing, a screw spindle rotatably mountedtherein, a threaded sleeve engaged by the screw spindle, a gear wheelrotatably mounted on the sleeve, and a valve disk engaged by the gearwheel.

ceases 2.' A gate valve eolnprisii'ig a housing', screw spindlerotatably mounted therein, a threaded sleeve engaged by the screwspindle, a gear wheel rotatably mounted on the sleeve and having athreaded rim, and a valve disk engaged by said rim.

3. A gate valve comprising a housing, a screw spindle rotatably mountedtherein, a threaded sleeve engaged by the screw spindle, a gear wheelrotatably mounted on the sleeve and having a threaded rim, and a valvedisk having a threaded rim that engages the wheel rim.

1. A gate valve comprising a housing, a screw spindle rotatably mountedtherein, a threaded sleeve engaged by the screw spindle, a gear wheelrotatably mounted on the sleeve and having an internally threaded rim,and a valve disk having an externally threaded rim, that engages thewheel rim.

5. A gate valve comprising a housing, a screw spindle rotatably mountedtherein, a threaded sleeve engaged by the screw spindle and having apair ot trunnioiis,`threaded conical gear wheels engaging the trunnions,threaded valve disks engaging the gear wheels, means for rotating thegear wheels, and means for holding the valve disks against rotation.

6. A gate valve comprising a housing, a screw spindle rotatably mountedtherein, a threaded sleeve engaged by the` screw spindle, threaded gearwheels rotatably mounted on the sleeve, threaded valve disks engagingthe gear wheels, a beveled gear wheel meshing into the threaded gearwheels, and means for rotating said beveled gear wheel.

7. A gate valve comprising a housing, a screw lspindle rotatably mountedtherein, a threaded sleeve engaged by the screw spindle, threaded gearwheels rotatably mounted on the sleeve, threaded valve disks engagingthe gear wheels, a beveled gear wheel loosely mounted on the screwspindle and meshing into the threaded gear wheels, and means independentof the spindle for rotating the beveled gear wheel.

8. A gate valve comprising a housing, a screw spindle rotatablyv mountedtherein, a threaded sleeve engaged by the screw spindle, threaded gearwheels rotatably mounted on the sleeve, threaded valve disks engagingthe gear wheels, a beveled gear wheel loosely mounted on the screwspindle and meshing into the threaded gear wheels, an elongated gearwheel integral with the beveled gear wheel, a pinion engaging theelongated gear wheel, and means tor rotating the pinion.

9. A gate valve comprising a housing, a screw spindle rotatably mountedtherein and carrying a tirst hand wheel, a threaded sleeve engaged bythescrew spindle, conical gear wheels rotatably mounted on the sleeve andhaving threaded rims, valve disks having threaded rims that engage thewheel rims, a beveled gear Wheel engaging the conical gear Wheels, and asecond hand Wheel loosely mounted on the spindle and operativelyconnected to the beveled gear Wheel.

l0. A gate valve comprising a housing, a cover secured thereto andhaving a tubular extension, a screw spindle centered Within saidextension, a threaded Sleeve engaging the spindle, a pair of conicalgear Wheels rotatably mounted on the sleeve, valve disks engaged by saidgear Wheels7 a beveled gear Wheel ineshing into the conical gear Wheels,an elongated gear Wheel integral with the beveled gear Wheel and adaptedto be received by the tubular cover extension, a pinion engaging theelongated gear Wheel and means for operating said pinion.

GEORGE E. R. ROTHENBUCHER.

VitneSSes:

LA VERGNE BRONK, CHARLES R. KRUEGEH.

